Abrading machine



A. EMMONS Q 1,998,417

ABRADING MACHINE A ril 16, 1935.

Filed Feb. 6, 1933 4 Sheets-Sheet 1 INVENTOR.

ATTORNEYS April 16, 1935. A. NJEMMONS ABRADING MACHINE Filed Feb. e, 1953 4 Shee ts-Sheet 2 INVENTOR.

@/M* ATTORNEY5.

April 16, 1935. A. N EMMONS 1,998,417

I ABRADING MACHINE Filed Feb. e, 1953. 4 Sheets-Sheet s W2MW @M/ M ATTORNEYS,

April 16, 1935. A. N. EMM ONS 1,998,417

7 ABRADING MACHINE Filed Feb. 6, 1935 4 Sheets-Sheet 4 INVENTOR.

ATTORNEYS.

Patented Apr. 16, 1935 2 1 99 417 UNITED STATES PATENT OFFICE ABRADING DIACHINE Arthur N. Emmons, Syracuse, N. Y.,, assignor to The Porter-Cable Machine Company, Syracuse, N. Y., a corporation of New York Application February 6, 1933, Serial No. 655,374 9 Claims. (01. 51-476) This invention relates to :abrading machines porting wheels 2 and 3 at its front and rear ends; which are pushed over the floor, or other sur- This chassis, as shown in Figure 5, is in the genface, to be finished, and has for its object a pareral form of a Y- with the le 4 theY formaticularly simple and economical, and compact tion extending upward at a rearwardly inclined 6 construction, or assembly of the supporting, or angle, and to which a handle is secured, and 5 main frame elements, of an abrading machine, the branches of the'Y formation constitute sills also the arrangement of a carriage which sup- 0h Which the Carriage p p ports the abrading drum, and the suction fan The front wheels 2 aresupported. at the front for collecting the dust from the drum and disends of the branches, or sills, and therear wheel charging it into a receptacle, the motor for actuis pref a ly a ast wh 'm unt d in a bracket 10 ating the drum and the fan, and the supporting 5 extending rearwardly from the leg 4. of the drum from the motor housing. 1 designates the carriage which is a hollow or The invention consists in the novel features S ton b c e in p y mounted at 3 Oh and in the combinations and constructions herethe t u 0 t sidesills thereof, the "pivot 3 inafter set forth and claimed. being located in the rear of and near the front 15 In describing this invention, reference is had wheels 2, a d located as 10W 5 possible, to the accompanying drawings in which like chare thehoriZOIltal plane of the aXiS 0f the actors designate corresponding parts in all the W ls e Ca r age 7 is ed W bearings views. I0 mounted on axles or pivots, these being the Fi ure 1 is a side elevation of an abrading imads f a shaft or p v t p 8 extending through 20 chine embodying my invention. the intermediate 'or hub portion a of the Y Figure 2 is a sectional view on line 2-'-2, Figshaped truck I; The carriage 'lis cast with parure 1. a titions I I and I2 therein which provide a fan Figure 3 is a plan view of the carriage. compartment'l3 and an air inlet M, the com- Figure 4 is arear elevation of the carriage, partment being located at one side of the rear 25 partly in section, showing the arrangement of the nd. o e ca ng a t w y between the fan in the fan compartment or housingof the wheels 2, 3, and the inlet extending forwardly carriage. i through the front end of the carriage and open- Figure 5 is a perspective view of the truck. ing at its rear end into the fan compartment I3 Figure 6 is a perspective view of the bracket, t h a t a et e fan compartso or fork head, which is secured to the motor housment is open at its outer side on one side of the ing. 1 machine and is closed by a plate l6 secured in This abrading machine includes a carriage pivposition as by screws 11, in which the plate is otally mounted on a truck on a transverse horimounted, a spindle l8 on which a centrifugal zontal axis to tilt slightly to raise and lower fan rotor I9 is mounted Within the compartment 35 the drum carried at the front end of the carriage 3- The plate is Provided With a hub in Which and thus, vary the pressure of the drum against the'spindleis mounted, and suitable anti-friction the surface, or floor, being treated, or finished, bearings 20 are interposed between the hub and said carriage being a-unitary piece, as a hollow the spindle l8, The casting is also provided with or skeleton casting provided with internal para substantially flat top, and the fan compartment 4 titions which provide a housingfor a centrifugal is provided with an outlet 2| opening through the fan, and a forwardly extending inlet for the, top ofthe carriage at one corner thereof.

fan housing opening through the front end of 22 is an abrading drum mounted on an axle 23 the carriage adjacent the rear of the drum, the supported by a fork 24 which is carried by a inlet passage opening centrallyinto the fan housbracket or head 25 rigidly secured to the hous- 5 ing, and an upwardly extending tangential outing 26 of the motor, to be presently described,the let passage through the top of the carriage for bracket or head 25 overhanging the front end of connection toan exhaust pipe delivering into a the carriage 1 so that the drum runs close to the suitable dust receptacle, a motor having itscasfront end of the carriage and the front end ofthe ing" rigidly mounted on the top of this unitary air intake passage I l. The fork 24 is connected 50 carriage with its am's extending transversely, and to suitablespring means located in the hubs 25 motion transmitting means between the rotor on the bracket or head 25, to spring press the of the motor and the drum, and between the rodrum and more or less yieldingly support it, and tor of the motor and the fan in the housing. the tension of the spring means is adjusted in l designates a truck, or chassis, having'supany suitable manner, as by nuts 21. The par- 55 ticular manner of supporting the forks 24 in the hubs 25- per se, forms no part of this invention, but the supporting of the head or bracket 25 on the motor housing 26, as a unit therewith, is one of the features of this invention.

The motor is mounted in the housing or casing 26, and this casing is secured on the top of the carriage l as by screws 28, which thread into openings 29 in the top of the carriage I, and the motor 26 is located relatively to the pivot 8 of the carriage to balance or counterbalance the weight thereof, and the weight of the drum 22 during the tilting of the carriage, as will be presently described.

The machine thus has a main frame which con sists of three main elements, the truck or chassis I, the carriage I, pivoted to the truck or chassis. I, the housing or casing, 26 of the motor and the bracket or plate 25 which is secured directly to the housing 26. This provides a particularly simple, compact, and economical frame for the machine which results in a compact structure consisting of a minimum number of parts which can be easily and economically assembled. This arrangement of the chassis I carriage 1, housing 25 for the motor and bracket or plate 25 with particular reference to the mounting of the bracket or plate 25, which supports, for the abrading drum, on the motor housing, constitutes one of the features of this invention.

A suitable entrance scoop, or dust collector 30 is secured to the front .end of the carriage 1, and extends under the drum 22 to collect the dust formed by the drum, and deflect it into the inlet passage M of the fan. The forks 24 also have forwardly extending arms 3| carrying a buffer 32 extending transversely of the front portion of the roller and to which is secured a shield 33. The motion of the rotor of the motor is transferred to the drum 22 by suitable means, here shown as a belt 34 running over a pulley 35 at one end of the drum 22, and over a pulley 35 on one end of the motor shaft 31. Also, suitable motion transmitting means connect the rotor or shaft of the motor with the fan l9, this being shown as a belt running over a pulley 4| on the motor shaft, and a pulley 42 on the spindle 18 of the fan. The belts are enclosed in suitable casings or guards 43, 44. 45 is an outlet pipe leading from the fan compartment l3 and discharging into a suitable dust receptacle 46 carried at the rear of the machine.

The carriage 1 is tilted about its pivot 8 by a suitable rock arm 41 pivoted at 48 to the handle 5 near the upper end thereof, and motion transmitting means, as a link 5!], connecting a rock arm 5| on the handle and the carriage, it being pivotedto the carriage at 52, these connections including certain spring adjusting means forming no part of this invention.

is a support for the cable enclosing the service wires for the electric motor, this extending upwardly and being for the purpose of holding the wire high enough so that it will not lie on the floor in the path of the drum 22. This arm 55 is pivoted at 56 to swing transversely to different angles in order to most advantageously arrange the cable so as not to interfere with the drum 22.

51 is a switch by means of which the current to the motor is turned on and off, the switch being mounted on a terminal box 58, to the terminal of which the service wires in the cable are connected, the box being mounted on, or integral with, the motor housing.

Owing to the carriage construction and the mounting of the motor and forks for the drum, the machine is particularly compact in construction, and economical to manufacture, as the carriage with the fan therein is assembled as one unit, the motor and the drum as another unit, and the latter unit assembled on the carriage, and there arev no mechanical connections to be made between the mechanism of the motor and the carriage, other than the belts 34 and 40.

What I claim is:

I. In an abrading machine of the type described, the combination of a truck, a carriage pivoted on a transverse horizontal axis to the truck, an abrading drum projecting in front of the carriage, driving mechanism for the drum including an electric motor having its housing -mounted on and rigid with the carriage, motion transmitting means between the rotor of the motor and the drum, a support for the abrading drum secured'toand carried by said motor housing, and means for tilting the carriage relative to the truck for raising and lowering the drum.

2. In an abrading machine of the type described, the combination of a truck, a carriage pivoted'on a horizontal axis to the truck, an abrading drum projecting in front of the carriage, a motor mounted on the carriage and having a housing rigid therewith, a support for the drum including a bracket, and means for detachably securing the bracket to the motor housing, motion transmitting means between the motor and the drum, and means for tilting the carriage on its pivot for raising and lowering the drum.

3. In an abrading machine of the class described, the combination of an abrading drum, a frame for carrying it including four elements, one element being a truck, the second element a carriage pivoted on the truck on a transverse horizontal axis, the third element being a motor housing mounted on the carriage and rigidly secured thereto, and the fourth element, a support for the drum secured to the front end of the motor housing, a motor mounted in the housing, motion transmitting means between the motor and the drum, and means for tilting the carriage about its horizontal axis to raise and lower it.

4. In an abrading machine of the type de scribed, the combination of a truck frame having front and rear wheels, a carriage pivotally mounted on a transverse horizontal axis on the truck frame between the front and rear wheels, said carriage being an integral unitary piece formed with a fan casing between the lateral sides thereof and a forwardly extending inlet opening through the front end of the carriage, means supported by the carriage for supporting an abrading drum in front of and adjacent the front end of the carriage and the front end of the inlet of the fan housing, a motor including a casing rigidly mounted on the carriage, motion transmitting means between the rotor of the motor and the drum, a fan mounted in the fan housing, and motion transmitting means between the rotor of the motor and the fan, and means for tilting the carriage and parts carried thereby relatively to the truck.

5. In an abrading machine of the type described, the combination of a truck frame Y shaped in general form with the branches of the Y formation arranged in substantially horizontal position and extending forward and the leg of the Y formation extending upward at an inclined angle, wheels for running on a surface mounted at the front ends of the branches of the Y, and

a third wheel supporting the leg of the Y, a carriage pivoted to the truck between the front and rear wheels thereof, a motor mounted on the carriage, a drum supported on the carriage and located in front of the front end thereof and in front of the front wheels of the truck, motion transmitting means between the motor and the drum, a handle mounted on the leg of the Y formation, and means for tilting the carriage relative to the truck.

6. In an abrading machine of the type described, the combination of a truck frame Y shaped in general form with the branches of the Y formation arranged in substantially horizontal position and extending forward, and the leg of the Y formation extending upward at an inclined angle, wheels for running on a surface mounted at the front ends of the branches of the Y, and a third wheel supporting the leg of the Y, a carriage pivoted between the legs of the Y, said carriage being an integral hollowcasting formed with a partition providing a fan housing, an air inlet opening through the front end of the carriage and an outlet, a motor mounted on the top of the carriage, an abrading drum, a fork carrying the same and supported from the front of the carriage, said drum being located in front of and adjacent the front end of the carriage and the air inlet, a fan in the fan compartment, motion transmitting means between the rotor of the motor and the drum, and the fan, a handle carried by the leg of the Y formation and means for tilting the carriage and parts carried there by as a unit relative to the truck.

7. In an abrading machine of the type described, the combination of a truck member having wheels for running on the surface being finished, a carriage mounted on the truck, an abrading drum projecting in front of the carriage, driving mechanism for the drum including an electric motor having its housing mounted on and rigid with the carriage, a support for the abrading drum secured to and carried by said motor housing, means operable to effect movement of the front portion of the carriage toward and from the wheels of the truck member.

8. In an abrading machine of the type described, the combination of a carriage, an electric motor having its housing mounted on and rigid with the carriage, and its rotor shaft extending transversely of the carriage and having one side of the motor housing extending across the front edge of the carriage, a bracket extending across the forward side of I the motor housing and being detachably secured thereto, means carried by the bracket for supporting the abrading drum, motion transmitting means between the motor shaft and the drum, and means for tilting the carriage relative to the truck.

9. In an abrading machine of the type described, the combination of a truck frame Y shaped in general form, wheels for running on a surface mounted at the ends of the branches of the Y, and a third wheel for supporting the leg of the Y, a carriage pivoted to the truck on a transverse pivot arranged adjacent the branches of the Y, a motor mounted on the carriage, an abrading drum supported on the carriage and located in front of the front end thereof, and in front of the front wheels of the truck, motion transmitting means between the motor and theabrading drum, and means for tilting the carriage relative to the truck.

ARTHUR N. EMMONS. 

